12 kW Solar on Grade I Norfolk Wool Church

The parish

A Grade I listed 14th-century ‘wool church’ in rural Norfolk, on the principal Norwich diocesan medieval-church estate. The church serves a small village congregation (40-60 Sunday worshippers) plus an active unlisted modern parish room used for foodbank, mums-and-tots, and weekly community lunch. Combined church+hall annual electricity bill: £4,200.

The PCC had been wary of solar for years due to the heritage profile of the building. Norfolk has the highest density of Grade I listed parish churches of any English diocese. The 2023 publication of Historic England’s revised guidance on solar electric panels for historic buildings, combined with the Diocese of Norwich Environment Programme launching a parish-renewables grant in 2024, prompted the PCC to re-engage.

The scoping conversation

Initial PCC enquiry came via the churchwarden in March 2025. The PCC’s concerns at first conversation:

• “Grade I — surely we can’t put solar on the roof?”
• “The diocese has only recently started funding parish solar — will we qualify?”
• “Our quinquennial flagged some lead work on the chancel roof that needs attention; does that complicate things?”
• “We can’t afford the heritage premium some installers charge”
• “What if SPAB or the Victorian Society objects?”

Initial desk feasibility (7 working days, free) addressed each:

• Grade I: yes — typically on less-visible slopes; for this building the chancel south slope was acceptable based on initial visibility assessment
• Diocese: Norwich Environment Programme awards typically £15,000-£22,000 for parish solar; success rates improving since launch
• Lead work: actually an opportunity — combining solar with lead repair under a single faculty saves time and improves the heritage rationale
• Heritage premium: real (15-20% in this case) but justified by the LBC approval rate
• SPAB/Victorian Society: 14th century medieval = SPAB notification; we engaged SPAB pre-application

The faculty pathway

PCC voted to proceed in April 2025. On-site survey conducted May 2025 with structural engineer, electrical engineer, and EASA-partner architect (our Norfolk-region heritage specialist). The chancel south slope was confirmed as the right location: visually less prominent than the nave south slope from the village street, structurally suitable for non-penetrative clamp fixings, electrically straightforward (DC cabling runs in the chancel roof void to the vestry electrical cupboard).

Faculty application package prepared June-July 2025:

• Statement of Significance (1,400 words drawing on the 2022 quinquennial, the listing description, and direct heritage analysis of the chancel fabric)
• Statement of Needs (900 words emphasising the parish foodbank programme, diocesan Net Zero alignment, and mission framing)
• Detailed drawings showing 12 kW system (22 panels) on chancel south slope with combined lead-repair scope
• Conservation impact assessment with CGI visualisation from agreed viewpoints (lych gate, village street, churchyard south boundary)
• SPAB engaged pre-application; their response was supportive subject to standard heritage conditions
• Diocesan architect engaged at survey stage; her support was strong

DAC consultation August 2025 — recommended with conditions. Conditions specified black-on-black panels, in-roof flush mounting (which we had already proposed), reversible fixings, and SPAB consultation continuation. All standard conditions we accept as default.

Public notice period September 2025 — no objections received. Faculty granted by the Chancellor of the Diocese of Norwich on 23 October 2025, 14 weeks after submission. Listed Building Consent granted in parallel by Breckland District Council on 18 October.

The grant funding

The PCC applied for three grants in parallel:

Grant	Application date	Decision date	Award
Buildings for Mission (CofE national)	August 2025	November 2025	£9,500
Norwich Diocese Environment Programme	July 2025	September 2025	£8,000
Listed Places of Worship VAT scheme	March 2026 (post-invoice)	June 2026	£2,400
Parish reserves contribution	—	—	£3,000
Total funded	—	—	£22,900
Total capex	—	—	£23,500

Net cost to PCC: £600 (effectively zero after the parish gift day raised £1,800 in November 2025).

The install

Install scheduled for January 2026 to coincide with the lead-repair window. Total install time: 9 working days. Crew of three engineers plus a heritage specialist for the chancel works and a specialist leadworker (sub-contracted) for the combined lead repair.

System specification:

• 22 black-on-black panels (Q CELLS Q.Peak DUO BLK-G10 405W)
• In-roof flush mounting on chancel south slope
• 12 kW string inverter (Fronius Symo) in vestry
• Non-penetrative clamp fixings on existing slate with lead-flashing repair at the array perimeter
• 5 kWh battery storage (BYD HVS) in the vestry boiler room
• All cabling in chancel roof void; no visible cables on elevations

DNO connection: single-phase G98, approved in 6 weeks. Final commissioning 5 February 2026.

First-year results (partial year)

The system was commissioned on 5 February 2026. Initial 4-month performance through 31 May 2026:

• Cumulative generation Feb-May: 4,200 kWh (vs 4,100 kWh modelled — within 2.5%)
• Self-consumption: 71% (above 65% modelled, thanks to active foodbank weekday use)
• Cost avoidance: £660 over 4 months
• SEG export income: £85
• Trajectory for first full year: £2,500-£2,800 saving

Battery contribution is meaningful — without the battery, modelled self-consumption would have been 38% (Sunday-only church profile). The battery captures midday surplus and discharges during evening foodbank, Tuesday playgroup, and weekend hall use.

The Norfolk regional context

This was our 7th delivered installation in the Diocese of Norwich and the first Grade I delivered in the diocese under the new (2024) Environment Programme funding round. The diocesan environment officer subsequently asked us to brief two other Grade I parish PCCs considering similar projects. This is a typical pattern — successful Grade I projects in a diocese tend to unlock subsequent Grade I projects.

The Norfolk Historic Churches Trust took an active interest and has subsequently signposted three other Norfolk parishes to us. The collaboration between us, the diocesan environment office, and the historic churches trust represents the strongest support network for Norfolk parish solar.

What we learned

• Grade I parish solar in Norfolk is achievable with proper heritage design and pre-application engagement with SPAB
• Combining solar with concurrent lead repair under a single faculty improves the heritage rationale and reduces project management overhead
• Diocese of Norwich Environment Programme awards are accessible for properly-prepared applications
• Battery storage is essential for Sunday-only churches — the 5 kWh investment lifted self-consumption from 38% to 71%
• The Norfolk Historic Churches Trust is an active referral source once successful precedents exist

Could we deliver a similar project for your Norfolk parish?

If your parish is in Norfolk (Diocese of Norwich, around 580 parishes) and considering parish solar, we’d be happy to provide a free desk feasibility. Request your free feasibility through our quote page.